1 Reference standard: GB/T 5023.3 2 Professional QC inspection 3 Free samples 4 Reply in 12 hours 5 Best price 1 Standard GB/T 5023.3 11997, IEC227, Q/ZEL 02-20022 Voltages 300/500V, 450/750V (600/1000V also avaiable) Permissible continuous operating temperature of the conductor:70°C The ambient temperature: >0°C3 Application suitable for construction, power installations, building, housing and ...